docs: def generate(self, vars=None, env=None):
          """Generate this template with the given arguments."""
          def defined(v, default=None):
              _v = default
              if v in vars:
                  _v = vars[v]
              elif v in env:
                  _v = env[v]
              return _v
  
          namespace = {
              # __name__ and __loader__ allow the traceback mechanism to find
              # the generated source code.
              "defined": defined,
              #fix RuntimeWarning: Parent module 'a/b/c' not found while handling absolute import warning
              "__name__": self.name.replace('.', '_'),
              # "__name__": self.name,
              "__loader__": ObjectDict(get_source=lambda name: self.code),
          }
          namespace.update(default_namespace)
          namespace.update(env or {})
          namespace.update(self.namespace)
          namespace.update(vars or {})
          namespace['_vars'] = vars
          exec_in(self.compiled, namespace)
          execute = namespace["_tt_execute"]
          # Clear the traceback module's cache of source data now that
          # we've generated a new template (mainly for this module's
          # unittests, where different tests reuse the same name).
          linecache.clearcache()
          return execute()